Improvement in harness-motions for power-looms



: UNITED STATES PATENT OFFICE.

CfDUCKVVORTH, OF MOUNT CARMEL, CONNECTICUT.

IMPROVEMENT IN HARNESS-MOTIONS FOR' POWER-LOOIVIS.

Speciiication forming part of I .etters Patent N0. 49,096, dated August 1, 18,65.

To all whom 'it may concern;

,Beit known that I, C. DUCKWORTH, of Mount Carmel, New Haven county, State of Connecticut, have invented a new and Improved Harness-Motions for Power-Looms; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is a vertical sectional view through the contrivances for moving the harness. Fig.

2 shows the knives and hooks and the connecting-rods for giving motion to them. Fig. 3 isa vertical section through the studded pattern-cylinder and the shaft upon which the arms of the knives and hooks have their bearings. Figs. 4 and show the manner of sustaining and guidingtheknives and their hooks. Similar letters ot' reference indicate corresponding parts in the several figures.

This invention relates to that kind of harness-motion which is especially adapted for fancy or figured weaving, and in which the y movement ot' the harness and opening of the shed are eected by means of contrivances acting in propertimes upon and giving an alternate reciprocatingmotion to hooked rods which are connected to the levers or jacks of the harness.

The main object of my invention is to obtain a uniform pitch or inclination of the shed, whichever heddles may be brought into action for opening the same, by so applying the knives which operate upon the hooked rods above mentioned to their shaft that one of the ends of cach knife Will'have a motion imparted to it independently of their opposite ends,as will be hereinafter described.

A is the frame of a loom, and B the drivingshaft which gives motion to the contrivances for actuating the harness.

C D are levers or jacks, between which the heddles are stretched in the usual manner, and D are the hooked rods, which are attachedto the outer ends of the jacks, and which are so formed as to receive anup-and-down motion from the knives a a and hooks or closers b b. The knives a. a' are pivoted at their ends to two arms, c c', which are applied .-to a rockshaft, o2, that hasits bear-in gs upon aframe, A', as shown in Figs. l, 2, and 3, and one end ot' each knife projects beyond its respective arm and tits looselyinto a vertical slot. The projection c2 of the knife a works in a slot which is made in an adjustable plate, c3; lout the projection a2 ot the knife a Works in a slot which is made through one side of the frame A'. Both knives work in verticalplanes but they are not always in horizontal planes. The arm c is keyed rigidly to its shaft c?, and rocks with this shalt; but the arm o is applied loosely on its shaft o2, so that it can be rocked independently thereof. On the outer end of the rockshat't c2 a crank, d, is keyed, which connects with an eccentric wrist-pin, e, on the Wheel E of the driving-shaft B by means of a pitmanrod, F, as shown in Fig. 2. By revolving the wheel Ea certain amount ot' motion is given to the arm o, and to those ends ot the knives which are pivoted to this arm.

At an intermediate point between the ends of the pitman F a pitmamF, is pivoted, which connects with the loose arm c by means of a wrist-pin, e', which can be adjusted and set nearer to or farther from the shaft c2 at pleasure. The point at which the pitman F is connected to its arm or crank d is farther from the center ot the rockshaft c2 than the point at which the pitman F is connected to its arm o'; hence it will be seen that the extent of vibration or length ot' movement of the arm c will be greater than that of the arm c, and consequently the knivesa a. will at certain times during the movement ot' the parts assume .inclined planes, one knile inclining in an opposite direction to that of the other knife, as shown in Fig. 2.

The amount of inclination which it is desired to give the knives aa. maybe varied by adiusting the wrist-pin ofthe pitman F, as above described. By thus inclinin g the knives I give a corresponding inclination to the shed, and effect this object Without giving to the parts the irregular jerking motion which is found in harness-movements wherein the knives are permanently inclined.' The hooks or projections z t" of the rods DD are acted upon by plates b b', which are -secured to the knives a a .in planes parallel to the saine, as shown in Figs. l and 5, so as to receive said projections between them and the knives, as shown in Fig. 1. These plates b b I term closers, as they serve to depress and to lift the hooked rods D D and theouter ends ofthe jacks, at the same l time admitting 0E the required movements being given to said hooked rods` by the studded l pattern-drum J.

'Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The employment of a loose cross-arm, c', upon the rock-shaft c2, in combinationwith the knives a a and xed cross-arm c, substantially as described.

2. The double-acting pitman-rods F F', the

former being connected to the rock-shaft c2 and the latter being connected to the loose arm c', substantially as described. y

3. The slotted adjustable guide a8; in combination with the projection a? on the knife a', substantially as described.

4. The specified construction, arrangement,

and combination of the closers b b andknives a a', when the latter are operated as described, for the purpose set forth.

Witnesses; C. DUGKWOR'IH.

J oHN DUGKWORTH, PHILEs DIGKERMAN. 

